Largest Company Tracker

Shared workspace on Qwidgets for tracking prediction markets across Kalshi, Polymarket, Manifold, and PredictIt. Live prices, candlestick charts, order books, and historical analytics for every event and market on this page.

Markets in this workspace

Largest U.S. company by market cap—rolling cross-month tracker

Mega-cap rotation is one of the most-watched stories in equity markets, and Polymarket lists a monthly Categorical book on which of Nvidia, Apple, Microsoft, Alphabet, Amazon, or another contender ends each month with the highest closing market cap. The end-of-June Polymarket Categorical has now settled (June 30, 2026); the July monthly has not yet listed, so the live read is the year-end-2026 durable Categorical until it does.

Kalshi does not currently list a competing mega-cap monthly book, so this workspace is Polymarket-native by design—the cross-month Polymarket ladder is itself the cross-product story. The 2nd- and 3rd-largest sub-events extend the anchor: when those distributions narrow, the rotation is binary; when they spread, the mega-cap pack is reshuffling broadly. The July anchor rotates in automatically once Polymarket lists it.

The June book has settled; the year-end durable is the live read through Q4 until the July monthly lists. Compare the settled June distribution against the year-end book: when the year-end widens versus the month, the market is pricing rotation risk; when it narrows, it's reading consensus on the leader.

The 2nd- and 3rd-largest books surface how the rest of the pack is being read. Concentrated 2nd-place pricing means a clean two-horse race for the #1 spot; spread means the next-tier contenders are all in play. Note the smaller volume—these are the secondary distributions, not the primary anchor.

The June anchor's daily history shows whether the lead was steady or contested into settlement. The book settled on the closing market cap on June 30, 2026 per Polymarket's resolution criteria.

What to watch: earnings windows (Nvidia, Apple, Microsoft, Alphabet, Amazon, Tesla, Meta) and any megacap-specific news cycles. Mega-cap leadership has been volatile through 2025–26 as the AI-capex thesis and the cloud-margin story trade leadership across Nvidia, Microsoft, and Apple. The Polymarket monthly book is the cleanest near-term reference; the year-end durable is the longer-horizon consensus.

Settlement source: closing market cap on the relevant date per Polymarket resolution language.